Johnny's home-built CPU corner (and other stuff, maybe)

XBUS RTC - Real Time Clock

Of course can't a seriusly 8080 be without a RTC, so I had to make one.

This was my first version, oddly named 1.1, but once again I fell on the parallel interfacing an ATmega processor to the 8080.

Version 101 uses a ATmega328P to "talk" to the clock ship using I2C and where intended to simplify it all for the 8080 by exposing a simpel parallel interface.

Version 2.0 instead uses an Epson RTC-72421 chip that are parallel, making a child play to interface

to the 8080. So far I haven't got time to test it, but it's there on the table, waiting.

Not shown here are the 64 pin XBUS connector.

Homebuilt CPUs WebRing

JavaScript by Qirien Dhaela

Join the ring?

To join the Homebuilt CPUs ring, drop Warren a line, mentioning your page's URL. He'll then add it to the list.
You will need to copy this code fragment into your page (or reference it.)
Note: The ring is chartered for projects that include a home-built CPU. It can emulate a commercial part, that′s OK.
But actually using that commercial CPU doesn′t rate. Likewise, the project must have been at least partially built: pure paper designs don′t rate either.
It can be built using any technology you like, from relays to FPGAs.